Lithium battery energy storage system fire safety protection detection alarm device

Abstract

The utility model relates to the field of battery fire-fighting monitoring equipment, in particular to a lithium battery energy storage system fire-fighting safety protection detection alarm device, which comprises a cabinet body, a temperature sensor for detecting the temperature value of a lithium battery is arranged in the cabinet body, the temperature sensor is electrically connected with a PLC (Programmable Logic Controller), and the PLC is electrically connected with a fire-fighting controller; a plurality of clapboards are fixedly arranged in the cabinet body, the clapboards are provided with through holes for leading wires of the temperature sensors out of the cabinet body at the peripheries of the lithium batteries, the through holes are arc-shaped, and openings at two ends of the through holes are respectively positioned on the clapboards and the side wall of the cabinet body; a vertical hole communicated with the through hole is formed in the partition plate, is positioned at the bottom end of the concave part of the through hole, and is communicated with the storage cavity below the partition plate; the temperature sensors are attached to the upper surface and the lower surface of the lithium battery, and the through hole is located on an opening of the cabinet body and connected with an exhaust pipe. According to the utility model, the temperature values of the upper and lower wall surfaces of the lithium battery can be directly detected, the interference of air temperature is eliminated, and the error of the detected temperature values is reduced.

Description

Technical Field

[0001] The utility model relates to the field of battery fire monitoring equipment, and in particular to a fire safety protection detection and alarm device for a lithium battery energy storage system. Background Art

[0002] As an important energy storage component in the energy storage system, energy storage lithium batteries are widely used in the energy storage industry because of their easy maintenance and high capacity. Due to the chemical properties of lithium batteries during operation, they need to be kept within a certain temperature range to be used normally and smoothly. Especially when the temperature of lithium batteries rises, it is very easy to cause some safety accidents. Therefore, it is very important to monitor the temperature of lithium batteries during operation.

[0003] For the temperature monitoring of lithium batteries, the current method is to set up temperature sensors to detect the temperature around the lithium batteries, and then issue warnings or stabilize the temperature when abnormal temperatures are detected. However, when multiple lithium batteries are stored together, the heat transfer between the lithium batteries causes errors in the temperature detection results, and it is impossible to detect abnormal temperatures of a lithium battery in time, causing safety issues for the lithium batteries. Utility Model Content

[0004] The utility model is intended to provide a fire safety protection detection and alarm device for a lithium battery energy storage system, so as to solve the problem that when multiple lithium batteries are stored together, heat transfer causes errors in temperature detection results and abnormal lithium batteries cannot be discovered in time.

[0005] The fire safety protection detection and alarm device of the lithium battery energy storage system in this scheme includes a cabinet in which lithium batteries are stored, wherein a temperature sensor for detecting the temperature value of the lithium batteries is arranged in the cabinet, wherein the temperature sensor is electrically connected to a PLC controller, and the PLC controller is electrically connected to a fire controller;

[0006] The cabinet is provided with a plurality of partitions for isolating and forming a plurality of storage cavities. The partition is provided with a through hole for the wire of the temperature sensor to be led out of the cabinet at the periphery of the lithium battery. The through hole is in an arc shape. The openings at both ends of the through hole are respectively located on the partition and the side wall of the cabinet;

[0007] The partition is provided with a vertical hole connected with the through hole, the vertical hole is located at the bottom end of the recessed portion of the through hole, and the vertical hole is connected with the storage cavity below the partition;

[0008] The temperature sensor is attached to the upper surface and the lower surface of the lithium battery, and the through hole is located on the opening of the cabinet and is connected to an exhaust pipe.

[0009] Furthermore, the length of the portion of the partition that does not contact the lithium battery from the inner wall of the cabinet is 1-5 cm.

[0010] Furthermore, the length of the opening of the through hole on the partition from the lithium battery is 0.5-1 cm, and the opening of the through hole on the partition is close to the heat dissipation of the lithium battery.

[0011] Furthermore, four through holes are provided, two openings of the through holes on the partition are close to the heat dissipation side of the lithium battery, and two openings of the through holes on the partition are arranged at two ends of the opposite sides of the heat dissipation side of the lithium battery.

[0012] Furthermore, a heat insulating layer is fixedly provided on the bottom end surface of the partition, and the heat insulating layer is arranged opposite to the lithium battery.

[0013] Furthermore, a plurality of support columns for supporting the lithium battery are fixedly arranged on the partition, and the support columns are respectively located at the four corners of the lithium battery, and the height of the support columns is 1 cm.

[0014] Compared with the prior art, the beneficial effects of this solution are:

[0015] When multiple lithium batteries are stored together, they are stored separately in spaces separated by partitions, and wires are laid on the through holes set on the partitions. Combined with the vertical holes, the exhaust pipes use exhaust action to simultaneously extract the hot air around the lithium batteries and the air in the space below the partitions. This can eliminate the interference of air temperature during the direct detection of the temperature values ​​of the upper and lower walls of the lithium battery by the temperature sensor, reduce the error of the detected temperature value, and help dissipate the heat of the lithium batteries, thereby improving the heat dissipation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a longitudinal cross-sectional view of the cabinet in the first embodiment of the fire safety protection detection and alarm device of the lithium battery energy storage system of the utility model;

[0017] Figure 2 This is a principle block diagram of the first embodiment of the fire safety protection detection and alarm device of the lithium battery energy storage system of the utility model;

[0018] Figure 3 It is a top view of the partition in the second embodiment of the fire safety protection detection and alarm device of the lithium battery energy storage system of the utility model;

[0019] Figure 4 It is a longitudinal cross-sectional view of the cabinet in the third embodiment of the fire safety protection detection and alarm device of the lithium battery energy storage system of the utility model. DETAILED DESCRIPTION

[0020] The following is further explained in detail through specific implementation methods.

[0021] The reference numerals in the drawings of the specification include: cabinet 1, partition 2, lithium battery 3, temperature sensor 4, through hole 5, support column 6, vertical hole 7.

[0022] Embodiment 1

[0023] Lithium battery energy storage system fire safety protection detection and alarm device, such as Figure 1 and Figure 2 As shown: it includes a cabinet 1 for storing lithium batteries 3, and a temperature sensor 4 for detecting the temperature value of the lithium battery 3 is installed in the cabinet 1. The temperature sensor 4 can use an existing combined chip thermal resistor. The temperature sensor 4 is electrically connected to a PLC controller. The PLC controller selects existing products according to actual needs to achieve the purpose of temperature detection of multiple containerized lithium batteries 3. After receiving the temperature value, the PLC controller performs subsequent analysis. The specific analysis is selected according to actual application requirements. The PLC controller is electrically connected to a fire controller. The fire controller can use an existing product, such as a bay fire controller with model JB-QB-GST500. The subsequent processing requirements of the fire controller are also selected according to actual needs, such as early warning or corresponding linkage control, etc., which will not be repeated here.

[0024] A plurality of partitions 2 are welded inside the cabinet 1 to separate and form a plurality of storage cavities. The partitions 2 are located at the periphery of the lithium battery 3 and are provided with through holes 5 for the wires of the temperature sensor 4 to be led out of the cabinet 1. The through holes 5 are in an arc shape as a whole, like a bracket. The openings at both ends of the through holes 5 are respectively located on the partitions 2 and the side walls of the cabinet 1. The wires are led out from the through holes 5, which can keep the space of the cavity from being occupied too much.

[0025] A vertical hole 7 connected to the through hole 5 is opened on the partition 2. The vertical hole 7 is located at the bottom end of the recessed portion of the through hole 5. The vertical hole 7 is connected to the storage cavity below the partition 2, that is, the Y-shaped channel composed of the through hole 5 and the vertical hole 7 connects the upper and lower cavities of the partition 2.

[0026] The temperature sensor 4 is attached to the upper and lower surfaces of the lithium battery 3, and directly detects the temperature value of each position of the lithium battery 3, which is more accurate. The through hole 5 is located at the opening of the cabinet 1 and is connected to an exhaust pipe. All the exhaust pipes are evacuated by setting an exhaust pump. The wire is led out from the exhaust pipe, and glass glue is filled at the lead-out point for sealing. The setting of the through hole 5 and the vertical hole 7 can draw away the air on the upper and lower sides of the partition 2, and the heat dissipation effect is better, avoiding interference with the temperature sensor 4 detection of the lower surface of the lithium battery 3 in the upper cavity and the upper surface in the lower cavity.

[0027] The length of the portion of the partition 2 not in contact with the lithium battery 3 from the inner wall of the cabinet 1 is 1-5 cm. In the first embodiment, 2 cm is taken as an example, that is, a certain gap is maintained between the lithium battery 3 and the inner wall of the cabinet 1.

[0028] The length of the opening of the through hole 5 on the partition 2 from the lithium battery 3 is 0.5-1 cm, and the opening of the through hole 5 on the partition 2 is close to the heat dissipation position of the lithium battery 3.

[0029] A heat insulation layer is bonded to the bottom surface of the partition 2 , and the heat insulation layer is arranged opposite to the lithium battery 3 to reduce the heat exchange between the two cavities and reduce the interference of the heat exchange on the temperature sensor 4 .

[0030] The specific implementation process is as follows:

[0031] When the temperature of multiple lithium batteries 3 in the cabinet 1 is monitored, the temperature is detected from the upper and lower surfaces of the lithium battery 3 at the same time, and the exhaust pipe is used to extract the air in the upper and lower cavities of the partition 2 from the through hole 5 at the same time, so as to dissipate the heat of the lower surface of the lithium battery 3 above the partition 2 and the upper surface space of the lithium battery 3 below the partition 2, so that the two temperature sensors 4 of the lithium battery 3 will not be disturbed by the hot air, thereby reducing the error of temperature detection, and while extracting the hot air, the hot air will not be conducted to the position where the lithium battery 3 is placed on the partition 2, further reducing the interference of the heat in the air on the temperature sensor 4.

[0032] Embodiment 2

[0033] The fire safety protection detection and alarm device of the lithium battery 3 energy storage system is different from the first embodiment in that Figure 3 As shown, four through holes 5 are provided, of which two through holes 5 are opened on the partition 2 close to the heat dissipation side of the lithium battery 3, and the other two through holes 5 are opened on the partition 2 at both ends of the opposite side of the heat dissipation side of the lithium battery 3. The position setting of the through holes 5 can timely conduct away the heat on the heat dissipation side of the lithium battery 3, and also conduct away the heat in other places, thereby reducing the interference degree of hot air on the sensor detection result.

[0034] Embodiment 3

[0035] The fire safety protection detection and alarm device of the lithium battery 3 energy storage system is different from the first embodiment in that Figure 4 As shown, a plurality of support columns 6 for supporting the lithium battery 3 are welded on the partition 2, and the support columns 6 are respectively located at the four corners of the lithium battery 3, and the height of the support columns 6 is 1 cm. Through the arrangement of the support columns 6, the temperature sensor 4 at the bottom of the lithium battery 3 can dissipate heat when working, and the lithium battery 3 can dissipate heat, thereby improving the accuracy of the sensor in detecting the temperature of the lithium battery 3.

[0036] The above is only an embodiment of the utility model, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the utility model, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A fire safety protection detection and alarm device for a lithium battery energy storage system, comprising a cabinet in which lithium batteries are stored, wherein a temperature sensor for detecting the temperature value of the lithium batteries is arranged in the cabinet, wherein the temperature sensor is electrically connected to a PLC controller, and the PLC controller is electrically connected to a fire controller; Features: The cabinet is provided with a plurality of partitions for isolating and forming a plurality of storage cavities. The partition is provided with a through hole for the wire of the temperature sensor to be led out of the cabinet at the periphery of the lithium battery. The through hole is in an arc shape. The openings at both ends of the through hole are respectively located on the partition and the side wall of the cabinet; The partition is provided with a vertical hole connected with the through hole, the vertical hole is located at the bottom end of the recessed portion of the through hole, and the vertical hole is connected with the storage cavity below the partition; The temperature sensor is attached to the upper surface and the lower surface of the lithium battery, and the through hole is located on the opening of the cabinet and is connected to an exhaust pipe.

2. A fire safety protection detection and alarm device for a lithium battery energy storage system according to claim 1, characterized in that: The length of the portion of the partition that does not contact the lithium battery from the inner wall of the cabinet is 1-5 cm.

3. A fire safety protection detection and alarm device for a lithium battery energy storage system according to claim 2, characterized in that: The length of the opening of the through hole on the partition is 0.5-1 cm from the lithium battery, and the opening of the through hole on the partition is close to the heat dissipation position of the lithium battery.

4. A fire safety protection detection and alarm device for a lithium battery energy storage system according to claim 3, characterized in that: Four through holes are provided, two openings of the through holes on the partition are close to the heat dissipation side of the lithium battery, and two openings of the through holes on the partition are arranged at two ends of the opposite sides of the heat dissipation side of the lithium battery.

5. A fire safety protection detection and alarm device for a lithium battery energy storage system according to claim 4, characterized in that: A heat insulation layer is fixedly arranged on the bottom end surface of the partition, and the heat insulation layer is arranged opposite to the lithium battery.

6. A fire safety protection detection and alarm device for a lithium battery energy storage system according to claim 5, characterized in that: A plurality of support columns for supporting the lithium battery are fixedly arranged on the partition, and the support columns are respectively located at the four corners of the lithium battery, and the height of the support columns is 1 cm.

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